Love Poem: Why Couldn'T I Forgive You?

Why Couldn'T I Forgive You?

You've done worse things than that.
And I've always been able to forgive you.
But that one little thing.
It ruined us.
It tore us apart.
I couldn't believe it.
And I still can't.
You said you were sorry.
And you meant it.
So why couldn't I forgive you?